16391459 has 4 divisors (see below), whose sum is σ = 18733104. Its totient is φ = 14049816.

The previous prime is 16391449. The next prime is 16391461. The reversal of 16391459 is 95419361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 95419361 = 173 ⋅551557.

It is a cyclic number.

It is not a de Polignac number, because 16391459 - 2¹² = 16387363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16391449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1170812 + ... + 1170825.

It is an arithmetic number, because the mean of its divisors is an integer number (4683276).

Almost surely, 2^16391459 is an apocalyptic number.

16391459 is a deficient number, since it is larger than the sum of its proper divisors (2341645).

16391459 is an equidigital number, since it uses as much as digits as its factorization.

16391459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2341644.

The product of its digits is 29160, while the sum is 38.

The square root of 16391459 is about 4048.6366841197. The cubic root of 16391459 is about 254.0227055157.

The spelling of 16391459 in words is "sixteen million, three hundred ninety-one thousand, four hundred fifty-nine".